Incandescent gas-lamp.



0. WIEDER HOLD. INGANDESGENT GAS LAMP.

- APPLICATION FILED JAN. 30, 1911.

1,043,182. Patented Nov. 5, 1912.

2 SHEETS-SHEET 1.

Hlllll 32 WITNESSES. l/VVE/VTUH ML Q/WF m COLUMBIA PLANOGRAPH c0., WASHINGTON. D4 c .0. WIEDERHOLD.

INGANDESGENT GAS LAMP.

1121101111011 FILED 1111.30. 1911.

2 SHEETS-SHEET 2.

. INVE/VTUR @Qcm, Q/LQOQ/LA Md, (6

ATTORNEYS COLUMBIA PLANOGRAPH co.,WAsHlNGTON. n. c.

UNTTED STATE PATENT @FFTQE.

OSCAR WIEDERI-IOLD, F JERSEY CITY, NEW JERSEY.

INCANDESCENT GAS-LAMP.

LtlSJSZ.

To all whom it may concern:

Be it known that I, Osoan Nnznnnnom), a citizen of the United States, and resident of Jersey City, Hudson county, State of New Jersey, have invented certain new and useful Improvements in Incandescent Gas-Lamps, of which the following is a specification.

My invention relates to incandescent gas lamps and more particularly to those of the inverted type and has for its object to provide a means for protecting the mantle against injury from a match, taper or other igniting medium. The said'means is preferably made movable to and from an operative position and when in an operative po sition, in addition to protecting the mantle also looks the mantle holder against rotation so that accidental dislocation of said mantle holder and mantle is prevented.

A further object of my improvement is to so construct said means that when it is in an inoperative position it will prevent the usual globe from being closed or placed in position. It is thus impossible to accidentally or otherwise leave the mantle unprotected.

A still further object of my invent-ion is to improve the construction of the mixing tube or Bunsen burner so that the same will always remain relatively cool while the lamp is burning and will prevent the mixture of gas and air from becoming preheated before reaching the burner, a very important feature when acetylene gas is used as a fuel.

My invention will be fully described hereinafter and the features of novelty will be pointed out in the appended claims.

Reference is to be had to the accompanying drawings in which Figure 1 is a central section of an inverted incandescent gas lamp with my invention applied thereto; Fig. 2 is ail-enlarged detail view partly in section of the burner portion of said lamp; Fig. 3 is a vertical section on the line 33 of Fig. 2; Fig. 4 is a horizontal section on the line l 4t of Fig. 2; 5 is a similar view on the line 55 of Fig. 2; Figs. 6 and 7 are views similar to Fig. 5 illustrating different forms of mantle protectors which. I may use; Fig. 8 is a partial elevation illustrating a different form of my improvement and Fig. 9 isa horizontal sec tion thereof looking down on Fig. 8.

In the drawings I have shown my invention embodied in an inverted gas lamp of the kind largely used for lighting railroad cars as my improved construction is partic- Specification of Letters Patent.

Application filed. January 30, 1911.

Patented Nov. 5, 1912.

Serial No. 605,378.

ularly adapted for use in connection with this type of lamp although not restricted to such use. Lamps of this description usually comprise arms 10 secured to the roof of the car and supporting a ring 11 and a chimney 12. At least one of said arms indicated as 10 is generally in the nature of a tube and is connected wit-h the source of gas supply and also with the burner as will be more fully described hereinafter. A second ring 13 is hinged or otherwise pivoted at 14 to the ring 11 as shown in Fig. 1 and is maintained in its locked position by means of a suitable catch 15. The said ring 13 serves as a carrier for the globe 16 which is usually removably secured in said ring by means of screws 16 and in its closed position covers or incases the burner, the mantle and other connected parts. In my improved construction the tubular arm 10 in addition to communicating with the source of gas supply is also connected with an internally screw threaded nut 18 forming part of or secured to the apertured nozzle 19. This nozzle 19 is externally screw-threaded and screws into the'one end ofa coupling 20 which at its other end is recessed to receive the one end of a burner tube 20*, a set screw 20 or similar fastening n eans being provided for securing the said end of the burner tube in position in said coupling. The said burner tube is bent downwardly and has its free end screw-threaded to receive the mantle supporting nut 21 as clearly shown in Figs. 1 and 2. The said nut 21 is provided with a centrally apertured, externally screwthreaded neck 22 upon which the mantle carrier 23 is adapted to be screwed, said mantle carrier 23 being provided with downwardly extending arms 24 to which the usual mantle 25 is secured. The mantle carrier 23 is further formed with radially extending preferably horizontal members 26 which project outwardly beyond the largest diameter of the mantle 25 and serve as a means for manipulating said mantle carrier when positioning it on or removing it from the neck 22.

i To protect the mantle against injury from a match, taper or other igniting medium and to prevent rotation of the mantle car rier I provide the attachment which I will now describe. A yoke 27 is provided with an .apertu adjustable lengthwise of said tube, a set .131 through which the tube 20 exten ds and screw or other fastening device 28 being provided for securing said yoke in its adjusted posit-ion. The said yoke 27 is formed with a downwardly extending fork 29 in which is pivoted a member 30 carrying the downwardly extending rod 31. The lower end of this rod 31 as shown in Fig. 2 and 5 is bent into a coil 32 the convoIutions of which are spaced apart to a slight degree and extend in a plane substantially at right angles to the axis of the rod 31. The said coil in its operative position is located in axial alinement with the downwardly bent portion of the tube 20 and is positioned a :-;:lig'ht distance below the mantle 25 as clearly shown in Fig. 2. The convolutions of the coil 32 are sufficiently close together to prevent a match, taper or other igniting medium from being inserted therebetween without however being close enough, to prevent the flame of the igniting medium from reaching the mantle. To prevent injury to the mantle by the said coil 32 as it is swung to its operative position I provide a stop 33 on the member 30 preferably integral therewith which by abutting against the tube 20 limits the movement of said member 30 and consequently the coil 32 in one direction. This stop 33 is so proportioned relatively to the remainder of the protecting device as to arrest the movement of the member 30 before the coil 32 reaches the mantle 25. In stead of forming the stop 33 as part of the member 30 the said stop 33 might be placed on the burner tube 20 without changing .its action. A flat U-shaped spring 34 has its one end inserted between the tube 20 and a portion of the yoke 27 and its other or free end resting on the member 30 and serves to maintain said member and consequently the rod 31 and coil 32 in operative position. The one end of the member 30 is flattened as indicated at 30 so that as said member, rod. and coil are swung to an inoperative position, the spring 34 will engage said flattened portion 30 and also hold said rod 31 and coil 32 in an inoperative position as indicated in dotted lines in Fig. 2. When swung to this inoperative position the coil 32 and a portion of the rod 31 extend beyond the peripheries of the rings 1.1 and 13 so that it is impossible to bring said rings into locking engagement with each other and the globe to its closed position unless the coil 32 and rod 31 are first returned to an operative position. It is therefore impossible to accidentally leave the mantle unprotected for the moment it is attempted to close the globe attention will be drawn to the fact. that the coil and rod are in an inoperative position through the inability to completely bring the rings 11 and 13 together, This is important as in many instancesit is unnecessary to swing the globe to ayepeapesaio to ignite the lamp, the

globe being provided with an opening in its lower portion through which a match, taper or other igniting medium may be inserted to light the lamp, so that the mantle is often punctured by the igniting medium as it is inserted to ignite the lamp. In con structions of this kind in which the globe is provided with an opening, said globe is only swung to an open position when it is desired to change the mantle or otherwise adjust or repair other parts of the lamp normally inclosed by said globe. Even in col'istructions where it is necessary to swing the globe to an open position each time it is desired to ignite the lamp the present construction will prevent the mantle from being left unprotected should said coil and rod have been moved to an inoperative position for any reason.

In order to prevent accidental unscrewing or dislocation of the mantle carrier 23 the parts are so proportioned and the yoke 27 is so adjusted along the tube 20 as to bring the rod 31, when it and the coil 32 are in an operative position, to a point within a circumferential line drawn about the outer extremities of the projection 26. Thus when the rod is in operative position, said mantle carrier 23 can only be moved accidentally or otherwise the distance between two adjacent projections 26 further movement being interrupted through the engagement of one of said projections 26 with the rod 31 as clearly shown in Fig. 4;. This is an extremely important point as. particularly in railroad lamps, the continued vibration while the cars are in motion has a tendency to rotate the mantle carrier in the direction of least resistance, which is a dislocating or an unscrewing movement, so that unless this movement is arrested, the continued vibration will finally separate the mantle carrier'and mantle from the burner and destroy or injure said mantle and carrier and ofttimes other parts ofthe lamp.

Instead of making the mantle protector in the shape of a coil as so far described the said protector as shown in Fig. 6 may comprise a disk 32 having perforations 32 and secured to or forming part of a rod similar to the rod 31. This disk protects the mantle against injury and the perforations 32 permit the flame of the igniting medium to reach the mantle. In still another form shown in Fig. 7 the protector may consist of a disk of wire cloth or netting 32 supported on a rod in a manner similar to the coil 32 and serving to protect the mantle and between the meshes of which the flame of the igniting medium may pass to the mantle. y

In Figs. 8 and 9 I have shown a slightly different form of mounting for the mantle protector. In the form shown in these figures a collar 27* having lugs 29 is secured the mantle carrier and mantle.

on the burner tube 20* at a convenient point preferably near the burner by means of a set screw 28 A pivot pin or shaft 29 is journaled in the lugs 29 and serves as a support for the depending rod 31 which rod 31 is similar to the rod 31 and is fixed on said pin 29 so as to have no movement relatively thereto. The rod'31 is provided with a protecting disk 32 similar to either of the disks 32, 32 or 32 and further has a projecting portion 31 which extends beyond the disk 32. The rod 31' and disk 32 serve the same purpose as does the rod 31 and disk 32 shown in Fig. 1 and are located in substantially the same relation to The pivot pin 29 in the form illustrated in Figs. 8 and 9 is extended on one side and bent at any angle to form a support for a weight 29. The angle at which said weight is supported is such that when the parts are in the position shown in Fig. 8 it will have a tendency to maintain the disk 32 beneath the mantle, a stop 29 being provided to limit the movement of the rod 31' and consequently the disk 32 in one direction. It is to be understood that the proportions of the parts are such that the weight 29' clears the tube 20 and collar 27 when the protector is swung on its pivot. When it is desired to change the mantle or to obtain access to the burner proper, the rod 31 may be swung on its pivot and with it the disk 32 to a position corresponding to the dotted position shown in Fig. 1. During this movement of the rod and disk, the weight 29 has been moved to the opposite side of the pivot pin 29* and will consequently now tend to maintain said rod and disk in an inoperative position. In this inoperative position of the parts the projecting portion 31 extends beyond the peripheries of the rings 11 and 13 and prevents them from be ing locked together and the globe closed. This projecting portion 31 of the rod 31 is only necessary when the pivot about which the rod 31* swings is approximately at the point shown or in other words near to the burner as in this case unless this portion 31 is provided no part of the protector would project beyond the peripheries of the rings 11 and 13. In this form therefore as in the preceding form the mantle is adequately protected against injury from the igniting medium, the mantle carrier is held against accidental dislocation and it is impossible to swing the globe to a closed position while the protector is in an inoperative position. It is of course to be understood that the pivot pin shown in Fig. 1 may be extended on one side to support a weight similar to the weight 29 in which case the spring 34 might be omitted.

In lamps of the kind to which the present invention relates and particularly in inverted lamps where acetylene gas is used as a lighting medium it is extremely difficult to keep the mixing tube or Bunsen burner sufliciently cool to maintain the lamp at a maximum of efliciency for any length of time. In lamps of this kind as soon as the mixing tube becomes heated a carbon will form therein so that the quality of the combustion mixture is affected and the tube clogged up. It is also extremely important when using acetylene gas as a fuel or an illuminant to deliver the mixture of gas and air to the burner as cool as possible in order to secure the best results. To overcome these serious objections and attain the desired re sults, I provide an inner tub-e 35 having a flaring end 36 and an externally screwthreaded neck 37 adapted to screw into the coupling 20 so that said inner tube will ex tend axially of the burner tube 20 and preferably into the bend thereof as clearly illustrated in Fig. 2. This inner tube 35 itself is of smaller diameter throughout than the tube 20 and does not engage or contact with said tube 20 at any point excepting at the neck 37. I11 operative position the entrance or inlet end of said inner tube 35 is in close proximity to the nozzle 19 to prevent flare back. air inlets 20 being provided in the couplin 20 adjacent to the entrance end of the inner tube 35 for the admission of air to said inner tube. In operation gas passes from the nozzle 19 into the inner tube 35 and cool air enters through the inlets 20 and becomes mixed with said gas. the mixture of gas and air passing out at the flaring end 36 of the inner tube into the tube 20 and then to the mantle. By having the inner tube 35 spaced from the outer tube 20 substantially throughout its entire length the said inner tube is effectually protected against the transmission of heat from said outer tube which becomes very hot as the lamp is burning. The point of engagement between said inner and outer tubes being in close proximity to the air inlets 20 through which cool air is always passing this particular part of said inner tube is kept particularly cool so that any heat which tends to pass from the tube 20 to the coupling 20 and to the inner tube 35 by transmission is arrested and cooled. The cool air which enters through said inlets 20 as it becomes mixed with the gas entering from the nozzle 19 also passes along the remainder of the inner tube 35 and serves to keep it cool, the inner tube being preferably made of very thin material. In order to prevent the cool mixture of gas and air as it leaves the tube 35 from coming into direct contact with the hot burner tube and thus becoming heated before it reaches the burner I provide the inner surface of the said burner tube 20 with a heat insulating lining 20 of asbestos or the like. This lining may be in the nature of a tube or cylinder which is inserted into the burner tube from its free end and which has its one end in close proximity to the burner and its other end at a point beyond the exit end of the inner tube 35 as clearly shown in Fig. 1. This heat insulator thus has a portion located bet-ween the inner tube 35 and burner tube 20 and extends from the exit end or mouth of the tube 3:1) approximately to the burner. The mixture of gas and air as it leaves the tube 35 thus passes through this insulating tube 20 and does not come into contact at any point with the hot burner tube. My improved mixing tube and burner tube construction thus prevents the formation of carbon by keeping the mixing tube or Bunsen burner always cool and always maintains the mixture in a cool and highly eilicient condition for delivery to the burner and thus increases the efficiency of the lamp without increasing the cost of operation.

My improved lamp reduces the cost of operation in the first place by protecting the mantles against accidental injury and secondly by preventing the formation of carbon which when permitted to form reduces the quality of the combustion mixture and also shortens the life of a lamp.

Various changes in the specific forms shown and described may be made Within the scope of the claims without departing from the spirit of my invention.

I claim 1. In an incandescent gas lamp, a globe movably mounted on said lamp, a burner tube, a mantle carried thereby and a device for protecting said mantle against injury,

said device being movable in a vertical plane to a position Where a portion thereof extends beyond the periphery of the globe to prevent closing thereof.

2. In an incandescent gas lamp, a globe ring, a globe pivotally mounted thereon, a burner tube, a mantle carried thereby and a device for protecting said mantle against injury, said device being movable to a position so as to extend between said globe and globe ring to prevent closing of the globe.

In an incandescent gas lamp, a globe pivotally mounted thereon, a burner tube, a mantle carried thereby, a device pivotally mounted on said lamp to move about an axis parallel with the axis about which the globe is adapted to move, said device being movable to a position where a port-ion thereof extends beyond the periphery of the globe to prevent closing of the globe and means on said device adapted to protect the mantle against injury.

4. In an incandescent gas lamp, a burner tube, an interior mixing tube extending lengthwise of said burner tube and annu-.

larly spaced therefrom and having'its exit end located at a distance from the exit end of the burner tube and a heat insulating lining located interiorly of said burner tube and extending from the exit end of said mixing tube substantially to the exit end of the burner tube.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

OSCAR vVIEDERHOLD. Witnesses:

JOHN A. KEI-ILENBECK, M. H. LOOKWOOD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington. D. C. 

